Allied Telesis AT-9924SP-30, X900-48FE-N manual Transit node receives a Ring-Down-Flush-FDB message

Page 54

Debugging

3.The transit node receives a Ring-Down-Flush-FDB message

In the meanwhile, the master node has received a Link-Down message from the switch at the other end of the broken link (in step 3 on page 48). Therefore, the master node realises that the ring is broken and acts accordingly. As part of the recovery process, the master node sends a Ring-Down-Flush-FDB message. The transit node receives this message and flushes its forwarding database.

This is the packet shown in step 4 on page 49 of the master node debug output.

EPSR Port1 Rx: 00e02b00 00040000 cd280619 8100e3e8 005caaaa 0300e02b 00bb0100 00541ee9 00000000 0000cd28 0619990b 00400107 03e80000 00000000 cd280619 00000000 02000000

EPSR Port1 Rx:

-----------------------------------------------------------------------

TYPE

= RING-DOWN-FLUSH-FDB

STATE

= FAILED

CTRL VLAN

= 1000

SYSTEM

=

00-00-cd-28-06-19

HELLO TIME

=

0

FAIL TIME

=

0

HELLO SEQ

=

0

 

 

 

-----------------------------------------------------------------------

Flush FDB EPSR: test vid: 2

4.The transit node sends a Link-Down message

The transit node realises that its port is down, sends a Link-Down message, sends a trap, and changes its state to Link-Down. The transit node sends this message some time after the link actually went down, because the ring ports are 1000M ports (see "Ports and Recovery Times" on page 30). Note that by this stage the ring has already changed topology to restore traffic flow. The master node detected the link failure by receiving a Link-Down message from the other side of the link.

This is the Link-Down message that the master switch received in step 5 on page 49.

Manager 9924-B>

 

EPSR

test, Port

2 port down

Flush FDB EPSR:

test vid: 2

Block EPSR:test

port:2 VLAN:2

EPSR

Port1 Tx:

00e02b00 00040000 cd24024f 8100e3e8 005caaaa 0300e02b

00bb0100

00542484 00000000

0000cd24

024f990b

00400108

03e80000

00000000

cd24024f

00000000 04000000

 

 

 

 

 

EPSR Port1 Tx:

-----------------------------------------------------------------------

TYPE

= LINK-DOWN

STATE

= LINK-DOWN

CTRL VLAN

= 1000

SYSTEM

=

00-00-cd-24-02-4f

HELLO TIME

=

0

FAIL TIME

=

0

HELLO SEQ

=

0

 

 

 

-----------------------------------------------------------------------

EPSR INFO: Send trap EPSR:test oldState:LINK-UP newState:LINK-DOWN nodeType:TRANSIT

EPSR test oldState:LINK-UP newState:LINK-DOWN

Page 54 AlliedWare™ OS How To Note: EPSR

Image 54
Contents Introduction What information will you find in this document?Which products and software versions does it apply to? How Epsr Works Epsr ComponentsEstablishing a Ring Recovering from a Fault Fault in a link or a transit nodeFault in the master node Transit Nodes with One Port Down Restoring Normal OperationMaster Node Transit Nodes with Both Ports DownHow To Configure Epsr Configuring EpsrEnable Epsr Iii. Remove the ring ports from the default VlanIv. Configure the Epsr domain Configure other ports and protocols as requiredModifying the Control Vlan Configure the Master Node a Example 1 a Basic RingCreate the Epsr domain Configure the Transit Nodes B and CRemove the ring ports from the default Vlan Add the data Vlan to the domainCreate epsr=test mode=transit controlvlan=vlan1000 Configure the master node switch a for domain Example 2 a Double RingConfigure the master node switch C for domain Configure EpsrConfigure the data Vlan for domain Configure the master node switch a for the Epsr domain Example 3 Epsr and RstpRemove the STP VLAN’s ports from the default Vlan Configure switch E for Epsr and Rstp Example 4 Epsr with Nested VLANs Epsr DomainConfigure the Epsr control Vlan Configure client switch G connected to transit node C Configure client switch E connected to the master nodeConfigure client switch F connected to transit node B Configure client switch H connected to transit node DExample 5 Epsr with management stacking Configure stacking on the first transit node host2 Configure stacking on the second transit node host3Configure the other VLANs on the stacked switches Configure Epsr on the stacked switchesConfigure the AT-TN7100 iMAP as Master Node Example 6 Epsr with an iMAPChecking the Master Node Configuration Following diagram shows the expected outputConfigure the AT-TN7100 iMAP as a Transit Node Checking the Transit Node ConfigurationClassifiers and Hardware Filters LINKS-UPPorts and Recovery Times Igmp Snooping and Recovery Times Health Message PriorityEpsr State and Settings Epsr Information Name Domain1 Snmp Traps Counters Master Node Node a Debug Output DebuggingLink Down Between Master Node and Transit Node Master node sends Health messagesMaster node continues sending Health messages Primary port goes downMaster node transmits a Ring-Down-Flush-FDB message Hello timer expires Hello timer expires againPrimary port comes back up Master node returns the ring to a state of Complete Master node receives the Ring-Up-Flush-FDB message on portMaster node transmits and receives Health messages Transit Node Node B Debug Output Transit node receives Health messagesPort 1 on the transit node goes down Transit node receives a Ring-Down-Flush-FDB messagePort 1 comes back up Transit node receives a Health messageTransit node receives a Ring-Up-Flush-FDB message 252 Link Down Between Two Transit Nodes Link between the two transit nodes goes down Master node receives a second Link-Down message Master node receives a Health message 51 AlliedWare OS How To Note Epsr 375 53 AlliedWare OS How To Note Epsr Transit node sends a Link-Down message Link comes back up Transit node receives another Health messageTransit node receives a Ring-Up-Flush-FDB message

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